期刊
BIORESOURCE TECHNOLOGY
卷 260, 期 -, 页码 85-94出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2018.03.087
关键词
Co-digestion; High-feeding frequency; Organic waste; Methanogenic capacity; Microbial community
资金
- National Natural Science Foundation of China [51608430]
- Scientific Research Program - Shaanxi Provincial Education Department [17JS077]
- Natural Science Foundation for Young Scientists of Xi'an University of Architecture and Technology, China [QN1615]
To understand the relationship between microbes and digester performance of high-frequency feeding CSTR, which could achieve stable CH4 production at high OLR by easing instantaneous feeding shock, attentions were paid on the variations of methanogenic capacity (MC) and microbial community with OLR increasing. Results showed that the MC for feedstock degradation could satisfy the need of effective conversion from feedstock to CH4 when the OLR remained below 16.4 g-TS/L/d. Furthermore, the MC for acetate, propionate and butyrate degradation increased by 73.8%, 303%, and 164%, respectively, with OLR increasing from 3.03 g-TS/L/d 12.6 g-TS/L/d. The evolution of both bacterial and archaeal communities provided additional information on the adaptation of functional microbes to environmental factors. The significant increase of abundance of Methanoculleus and Methanomassiliicoccus likely promoted the utilization of H-2, thus facilitating syntrophic methanogenesis, and consequently ensuring efficient CH4 production in stable stage.
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